| CPC B23K 31/02 (2013.01) [B23K 31/12 (2013.01); B23K 37/0435 (2013.01); B23K 2101/10 (2018.08)] | 1 Claim |
|
1. A robot welding assembly mechanism for annular weld detection and postweld heat treatment, wherein
the robot welding assembly mechanism includes a column, the column is mounted on a rotation base and rotates around an axis of the column; wherein
a plurality of transverse clamping portions are disposed at intervals on the column, the plurality of transverse clamping portions are configured to clamp an end portion of a welded workpiece;
a first V-shaped support portion is disposed at a periphery of the column, the first V-shaped support portion being height-adjustable, the first V-shaped support portion is mounted on a radial track, the first V-shaped support portion is capable of moving along the radial track to be fixed at an appropriate position, an extension line of the radial track is perpendicular to and intersects with the axis of the column, and the first V-shaped support portion is located on a side of the welded workpiece away from the column;
an annular track is disposed on an outer side of the radial track, the annular track is coaxial with the column, a plurality of second V-shaped support portions are disposed on the annular track, the plurality of second V-shaped support portions being height-adjustable, the plurality of second V-shaped support portions are capable of moving to a position to be fixed along the annular track, and both the first V-shaped support portion and the plurality of second V-shaped support portions are capable of supporting a non-welded portion of the welded workpiece to make an annular weld of the welded workpiece be suspended constantly;
a first driving mechanism of the rotation base, a second driving mechanism of the plurality of transverse clamping portions, and a third driving mechanism of each of the plurality of second V-shaped support portions are connected with a control system;
a movable operating platform is provided in the vicinity of the annular weld of the welded workpiece, the operating platform is configured to place a welding seam detection device and a heat treatment device, the robot welding assembly mechanism is configured to perform an annular weld detection process and/or a postweld heat treatment process; wherein the operating platform includes a movable part;
the annular weld of the welded workpiece includes one or more pipe sections, first butt welding seams between the one or more pipe sections, and second butt welding seams between the one or more pipe sections and one or more pipe fittings, a nominal diameter of the annular weld being not less than DN150 mm;
the robot welding assembly mechanism is configured to perform the annular weld detection process, including the following operations:
A. placing the welding seam detection device on the operating platform during a detection time period of the annular weld;
B. controlling the first driving mechanism of the rotation base and the third driving mechanism of each of the plurality of second V-shaped support portions, thereby making the column and the plurality of second V-shaped support portions synchronously rotate in place and then stop, at the same time, the annular weld of the welded workpiece being located right above or to a side of the welding seam detection device;
C. attaching patches to or marking detection portions on the annular weld;
D. turning on the welding seam detection device to carry out detection on a first detection region of the annular weld; after the detection of the first detection region is completed, turning off the welding seam detection device and controlling the second driving mechanism of the plurality of transverse clamping portions, thereby making the annular weld rotate by a preset angle, and then turning on the welding seam detection device to carry out detection on a second detection region of the annular weld until detection of all detection regions of the annular weld is completed;
E. referring to the operations B-D, carrying out detection on an annular weld of a next welded workpiece;
the robot welding assembly mechanism is configured to perform the postweld heat treatment process of the annular weld, including the following operations:
O. before a heat treatment of the annular weld, placing the heat treatment device on the operating platform;
P. controlling the first driving mechanism of the rotation base and the third driving mechanism of each of the plurality of second V-shaped support portions, thereby making the column and the plurality of second V-shaped support portions synchronously rotate in place and then stop, at this time, the annular weld of the welded workpiece being located in the vicinity of the heat treatment device;
Q. coating one or more adjacent annular welds with a heat treatment electrode and a heat insulation material;
R. turning on the heat treatment device to perform the heat treatment on the annular weld; and
S. referring to the operations P-R, performing the heat treatment on annular welds of other welded workpieces.
|